Knock, a company dedicated to simplifying notification infrastructure for developers, has raised $12 million in a Series A funding round led by Craft Ventures, bringing its total funding to $18 million. Knock aims to provide an easy-to-use API and component libraries that allow businesses to efficiently manage notifications without building and maintaining complex in-house systems. The platform is used by companies like Webflow, Vercel, and Amplitude to enhance user engagement and retention through seamless notification delivery. Knock’s vision is to offer a scalable, reliable, and flexible infrastructure that allows products to maintain a native feel while outsourcing critical services like notifications. With the new funding, Knock plans to expand its team, enhance its infrastructure, and continue developing developer-first tools to improve notification experiences for end users.